Radio frequency tuner



FIG. 1 is a FRONT ELEVATIONAL view of a radio frequency tuner showing our new design;

FIG. 2 is a TOP PLAN view thereof;

FIG. 3 is a BOTTOM PLAN view thereof;

FIG. 4 is a LEFT ELEVATIONAL SIDE view thereof;

FIG. 5 is a RIGHT ELEVATIONAL SIDE view thereof; and,

FIG. 6 is a BACK ELEVATIONAL view of the same. 

We claim an ornamental design for radio frequency tuner, as shown and described. 